Drill mounting



Jan. 17, 19739,

G. H. @ILM/NN` DRILL MOUNTING Filed Feb. 4, 1957 f ...Wt 3 m n H .i 4all, a .4 5 1% 44 5 .l/

EORGE H-.Glm m4.

. INVENTOR ATTORNEY Jan., 17, 1939. G, H. @ILM-AN 2,143,848

DRILL MOUNTING "Filed Feb. 4, 1957 7 sheets-sheet 2 5-v" .n nl!) IGEORGE H, GnLMAN.

- ATTORNEY Jan. 17, 1939.

G. H. GILMAN.

' DRILL MoUNTiNG '7 Sheets-Sheet 4 Filed Feb. 4, A 1937 @somma HGnLMAN.

ATTORNEY Jan. 17, 1939.' y G. H. Gui/:AN 2,143,848

DRILL MOUNT ING Filed Feb. 4, 1957 7 sheets-sheet 5 GEORQLVIJGILMAN. 16

ATTORNEY G. H.` GILMAN DRILL MOUNTING Jian. 17, 1939,

7 sheet-sheet e Filed Feb. 4, 1937 I Jam l 7, v l 939.

G. H. GILMAN j DRILL MOUNTING` Filed Feb. 4, 1957 MLU m /l 161 l, :g

GEORGE H. GILMAN.

l ENTOR ATTORNEY Patented Jan. 17, 1939 UNITED STATES PATENT QFFICEDRILL MOUNTING ginia Application February 4, 1937, Serial No. 124,094

19 Claims.

This invention relates t mountings for percussive tools, such' as rockdrills, 'and more particularly to a mounting for facilitating thesinking of shafts.

The sequence of operation in the sinking of shafts consistssubstantially of drilling, loading the drill holes, shooting and muckingor removing the material loosened by the shooting or blasting. The usualpractice is to employ hand-held rock drills or use column mounting forthe drills, with the result that much time and labor is required inlowering the drills into the shaft, setting them for drilling, removingthem from one drill hole to another and raising them from the shaft topermit the shooting and mucking operations.

An object of the present invention is to provide a mounting embodyingair and water manifolds and carrying a plurality of rock drills whichare adjustably supported so that they may be quickly and easily movedfrom one drill hole position to another, and which mounting may bequickly and easily lowered into or withdrawn from a shaft when desired,thereby materially reducing the time and labor required in the sinkingof a shaft and consequently reducing its oost.

Another object of the invention is to provide a drilling rig asspecified which embodies a carrying body upon which are carried air andwater manifolds, quickly and easily adjustable drill supporting arms ormembers which may be easily moved into a plurality of drilling positionsand into collapsed position for lowering the rig into or withdrawing itfrom a shaft, also supporting members, including adjustable mine-columnfeet r for holding the rig securely in place during drilling, whichsupporting members are so constructed and mounted that they may easilybe swung into non-operative position when desired.

More particularly the present invention embodies a drilling rig asspecified including a carrying body from which is suspended a supportingcolumn having a plurality of arms rotatably mounted thereon, which armsin turn have drill supporting bars adjustably carried thereby, upon fwhich the drills or other tools are adjustably mounted, therebypermitting a maximum variety of positions for the drills within thelimits of adjustment of the arms and drills.

The invention also embodies novel means for facilitating the adjustmentof the drill carrying bars and the drills thereon, which will permitadjustment of these elements by one man and without excessive effort.

With these and other objects in view, as may appear `from the.accompanying specification, the

(Cl. Z55-51) invention consists of various features of construction andcombination of parts, which will be rst described in connection with theaccompanying drawings, showing a drill mounting of the preferred formembodying the invention, and the features forming the invention will bespecifically pointed out in the claims.

In the drawings:

Figure 1 is a View partly in elevation and partly in section of theimproved drilling rig.

Figure 2 is a top plan of the drilling rig having the drills removed.

Figure 3 is a horizontal section through the drilling rig taken on theline 3 3 of Figure 1 of the drawings.

Figure 4 is a fragmentary section showing one of the supporting arms incollapsed position.

Figure 5 is a detailed section through one of the drill supporting barsshowing a drill mounted thereon and taken approximately on the line 5 5of Figure 1.

Figure 6 is a detailed cross-section taken on the line 6--6 of Figure l.

Figure 7 is a detailed cross-section taken on the line 'l-l of Figure l.

Figure 8 is a detailed cross-section taken on the line 8-8 of Figure 1and showing another means for holding the supporting arms innon-operative position.

Figure 9 is an enlarged fragmentary view showing the coupling memberemployed for adjustably connecting the drill or tool carrying bars tothe adjustable supporting arms.

Figure 10 is an enlarged side elevation of a modified form of the drillcarrying bar and the coupling member for connecting it to the adjustablesupporting arm.

Figure 11 is a top plan of the structure shown in Figure 10.

' Figure 12 is a cross-section taken on the line Z-Z of Figure 10.

Figure 13 is an enlarged view showing still further modied form of thedrill carrying .bar and the mann-er of connecting it to the adjustablearm and having parts of this structure broken away. Y

Figure 14 is a top plan view' partly in section, of the modified formshown in Figure 13.

Figure l5 is a view partly in section showing modified structure foradjustably mounting a drill or other tool upon the drill carrying bar.

Figure 16 is a cross-section on the line lS--l of Figure l5.

Figure 17 is a view in side elevation and -partly in section of aslightly modiiied form oi' the drill mounting or drilling rig showingthe same in collapsed position.

Figure 18 is a detail view of a part of the drilling rig shown in Figure17 with the platforms lowered.

Figure 19 is a top plan of the structure shown in Figure 18.

Referring more particularly to the drawings, the improved drill mountingcomprises a carrying body I which is preferably cylindrical in shape,having its upper end open. A bail 2 is attached to the upper end of thecarrying body I and is adapted to be connected with any suitable meansfor raising or lowering the drill mounting out of or into a shaft beingsunk, as indicated at A.

The carrying body I has a platform 3 secured to its lower end in anysuitable manner, and a rail 4 is carried by the platform 3. The platform3 is preferably made of cast metal and it may have a floor 5 of wood orany other suitable material upon which an operator may stand.

The platform 3 has a centrally disposed sleeve 6 formed thereon whichserves as a means of connecting the end of the column 'I to the carryingbody I. The column 'I depends from the carrying body I preferablyaxially thereof, and it serves as a mounting or support for a pluralityof drill carrying units 8.

Each of the drill carrying units 8 includes a carrying arm 9 whichextends radially from and downward along the column 1, as clearly shownin Figure 1 of the drawings, with the exception of the arms 9' of thelowermost units 8, which arms 9 extend radially and curve upwardly, asclearly shown in Figure 1 of the drawings. Collars ID are formed on theupper ends of the arms 9 and 9' and are mounted about the column 'I topermit the arms 9 and 9 to be swung about the column 'I as an axis.Clamping shoes II are adjustably carried by extensions I2 formed on thecollars I0, and these clamping shoes II are forced into clampingengagement with the` column 'I by means of clamping bolts I4 to hold thecollars I8 and arms 9 and 9' rigidly a-gainst swinging or rotarymovement relative to the column 1.

The collars Il) are held in proper spaced relation along the column I bymeans of spacing collar-s I5 which are held in place by set screws I6,as clearly shown in Figure '7 of the drawings.

The ends of the arms 9 remote from the collars IB are shaped to formtrunnions or cylindrical extensions I'I, to which extensions aredetachably connected coupling and supporting brackets I8. The couplingand supporting brackets I8 are mounted upon the cylindrical extensionsI'I of the arms 9 to permit pivotable movement of the coupling I8 aboutvertical axes and they are rigidly held in adjusted positions by meansof the clamping bolts I9.

Drill carrying bars 20 are slidably supported by the brackets I8 forlongitudinal movement relative to the brackets transversely of the axisof the arms 9 and 9', that is, for longitudinal movement relative to thebrackets in a horizontal plane. The drill carrying bars 20 are held inlongitudinally adjusted positions by means of the clamping sections'22of the brackets I8. Safety collars 23 are mounted on the inner ends ofthe bars 20 so as to prevent the bars from being pulled outwardlythrough the brackets I8.

Pneumatic tools such as rock drills or the like, are adjustably carriedby the drill carrying bars 28 and in the drawings a rock drill of thepneumatic feed type is illustrated at 24. These rock drills of thepneumatic or automatic feed type are particularly adaptable for use incombination with the other features of the drill mounting of the presentinvention, because they feed the drill automatically to its work,thereby permitting a material reduction in the number of drillersnecessary in sinking a shaft, and they also eliminate many of thedisadvantages of manually fed drills such as those employing screw feedsnot only in that they provide a steady, uniform and even feed for thedrills, but their feed mechanism will not clog and be interfered with bythe muck, etc., which is ever present in a shaft being sunk. The drillsshown in the drawings are of the type shown in Patent Numbers 1,659,139and 1,680,859 but it is to be understood that any type of automatic feeddrill or tool may be employed in combination with the drill mountingwithout departing from the spirit of the present invention, and also ifconditions warrant or require it, any suitable type of drill or tool maybe employed without departing from the spirit of the present invention.

The drill or tool 24 is mounted upon the bar 20 through the medium of asuitable mounting clamp structure 25. This mounting clamp structure 25is such that it permits longitudinally adjusted movement of a drillalong the bar 2U by means of the clamping portion 26 thereupon, and itpermits pivotal movement of the drill on an axis transversely of theaxis of the bar 20 through the medium. of the trunnion structure 2'I ofthe clamp. These clamps are of a type which has long been in use inconnection with the pneumatic feed percussive tools and forms no part ofthe present invention except in the general combination which permits ofthe great flexibility of adjustment of the drills. The drill 24 and theclamp structure 25 are held in adjusted position along the bar 20 bymeans of the clamping bolts 28 and the drill is held in various pivotedpositions by means of the locking structure indicated at 29.

By means of the arms 9 which are swingably mounted with respect to thecarrying body I through the medium of the collars I Il, theadjustability of the bars 20, and the longitudinal and pivotaladjustment of the drills 24 relative to the bars 20, it will be apparentthat relatively great limits of adjustability of the positions, angles,etc., of the drills are provided. By providing the plurality of drillcarrying units 8, a number of drills may be carried by the drillmounting and set accurately to drill holes in the rock through which theshaft A is being sunk. After one set of holes which are indicated at BinFigure 1 of the drawings has been drilled, the various drills 24 may bequickly, easily, and accurately set to drill the next series of holes,and an entire series of holes may' be simultaneously drilled. In sinkingshafts it has been proven that the best results in blasting are obtainedby a particular arrangement and angling of the drill holes and with thepresent drill mounting such angling of the drill holes may be quiteaccurately controlled.

In shaft sinking the working floor of the shaft is uneven, and usually asump as shown at C in Figure 1'7 of the drawings is left therein tocollect the water in the shaft to facilitate its pumping therefrom, andfor the purpose of providing a support for the bottom of the column 'Iand the drill mounting, and at the same time permit accurate positioningof the drill carrying bars 2E! at the proper level with respect to theworking Surface or floor of the shaft A, a foot 3U is adjustably`connected by means of a feed screw 3| to the lower end of the column 'LThe weight of the drill mounting or drilling rig is depended upon tomaintain it in position during drilling, however for the purpose of'steadying and properly positioning the mounting or rig in properposition in a shaft A, a plurality of anchoring members 3S are providedwhich are carrier by the carrying body I. Each of the anchoring members`3? 'comprise a column or arm 34 which is pivotally connected by meansof suitable pivot pins 35 and brackets 36 to the carrying body I,intermediately of its ends. The arms 34 extend radially from thecarrying body l and have minecolumn feet 3l, adjustably connectedthereto by means of feed screws 33 at their outer ends. After the drillmounting has been lowered into a shaft A the various feet 3l areadjusted to s'ecurely engage the relatively irregular surfaces of theside-walls `of the shaft to securely hold the drill mounting in positionwithin the shaft.

It is 'desirable when withdrawing the drill mounting from a shaft tocollapse it as much as possible so as to require as little space aspossible by the mounting when it is withdrawn and also to .permit it tobe moved freely upward out of the shaft, and it is for this reason thatthe arms 34 are 'pivotally connected to the carrying body I. Suitablepivotable supports 39 are provided for each of the arms 34. The supports3E are pivotal'ly connected as shown at 4i! to the carrying body I andthey have depending feet 4I formed thereon which engage the outer sidesof the carrying body I, as clearly shown in Figure l, of the drawings,to provide firm abutment surfaces between the pivotal arms 39 and thecarrying body I.

Each 4of the pivotal supporting arms 39 comprise spaced members 42, loneof which engages on each side of the arm 34. Pins 43 are removablycarried by the members 42 and when the anchoring arms 33 are in theirlowered position and dur-ing their movement into lowered position thepins 43 are inserted through suitable openings in the members 42 beneaththe arms 34. The 'ends of the members 42 are adapted to eng-age overlocking lugs 44, carried by the carrying `body I, when the arms 34 areswung into an upward collapsed position, as shown in Figures 4 and 17 ofthe drawings, suitable locking pins are inserted through the upperopenings 45 in the members 42 and into suitable openings 46 in thelocking lugs 44, so as to prevent accidental falling movement of theanchoring arms during the withdrawal of the drill mounting from a shaft.

The carrying body I also carries an air tank or manif-old 5d, which isconnected by means of a hose or other suitable connection 5I to anysuitable supply source (not shown) of air under pressure. The manifoldEl] has individual connections 52 thereon for supplying air underpressure through lsuitable flexible hose 53 to each of the drills ortools carried by the drill carrying bars 2d.

A Water manifold is also carried by the carrying body I and this watermanifold preferably extends axially through the air manifold, as shownin Figure 1 of the drawings, Vhowever if desired, it may be placed atany suitable position relative to the air manifold without departingfrom thc spirit of the present invention. The water manifold 54 hasconnection through a line 55 with a suitable supply source `(not shown)of cleansing water and it has individual connections, as shown at 56,with the various drills 24 for supplying holecleansing fluid to thedrills` The air under pressure which is employed for operating thedrills 24 c-ontains a percentage of moisture, and as the air is cooledthis moisture condenses out of the air. The air will be cooled by thetemperature within the shaft, particularly when the shaft becomes deep,and also by positioning the water manifold 54 within the air manifold5U, it will act as an after-cooler and will further cool the air in themanifold 50 and condense th-e moisture from the air. 'I'he condensate orextracted water will collect in the bottom of the manifold 5G from whichit may be drawn off through a drain cock 58. The air off-takeconnections 52 are at the top of the manifold 5d so that cleanrelatively dry air will be delivered to the drills of tools 24.

The cylindrical carrying body I is provided with openings 5? to permitaccess to the couplings 56 and to the drain cock 58 for the air manifold50.

In Figures l0 to 12 ofthe drawings amodied form of the structure forconnecting the drillcarrying bars or arms to the swingable arms of thedrill carrying units is shown. In this construction the substantiallycylindrical ends 6@ of the swingable arms 9a have brackets 6I mountedthereon. The brackets 6I are prevented from moving off the ends of thearms 9a by xed clamps 6I', which comprise clamping rings and clampingbolts 62.

The brackets 6I are bored to receive the ends 60 of the arms 9o and theyare securely held in adjusted position on the extension 60 by theclamping heads 63 and clamping bolts 64, as clearly shown in Figure 11of the drawings.

The brackets 6I have laterally positioned bar receiving barrels 65formed thereon, which are bored to receive the bars 66. The bores of thebarrels 65 extend at right angles to the axis of the extensions Sil. Thedrill carrying bars 66 have keys 6l formed thereon which engage inkey-ways 68 formed in the barrels 65 so as to prevent rotary movement ofthe slidable drill carrying arms or bars 66. The bars or arms 66 slidethrough the barrels 65 for permitting adjustment of the position of thedrills (not shown) carried thereby, and also to permit collapsing orinward movement of the bars toward the axis of the drill mounting whenit is desired to withdraw it from a shaft or lower it into one. Clampingscrews 69 are carried by the barrels 65 for locking the arms or bars 66in adjusted positions relative to the brackets 6I.

To facilitate the sliding movement of the bars or arms 66, r-elative tothe bracket 6I, rollers 1D are provided which are rotatably carried bysuitable brackets li, preferably formed on the barrels 65. The rollers'iii engage the hat outer surface of the keys 6l' so as to relievefriction and facilitate the sliding movement of the bars 66. While inthe drawings only two rollers 'lll are shown, it is to be understoodthat any number of rollers may be provided without departing from thespirit of the present invention. The provision of the rollers 'IB willpermit the bars or arms 66 with drills thereon to be adjusted by oneman.

Figures 13 and 14 show a further modification of the manner ofconnecting the drill supporting or carrying bars or arms to the swingingarms and in this modified form the brackets 8B are mounted upon theextensions SI of the swinging arms 9" in the same manner in which thebrackets I8 and 6! are mounted upon the similar Cil extensions. Thebracket 80 has a barrel 8| formed thereon at one side of the bracket,the bore of which extends at right angles to the axis of the extension8|'. The barrel 8| slidably receives therethrough the drill carrying armor bar 82. The arm or bar 82 has a rack 88 formed thereon and extendingl-ongitudinally thereof. The teeth of the rack 83 are engaged by apinion 84 so that by rotation of the pinion the bar or arm 82 may bemoved longitudinally through the barrel 8|. The pinion 8| preferably hasa wrench head 85 formed thereon for receiving a wrench or crank handle,by means of which the pinion may be rotated. The pinion is rotatablysupported on a shaft 86, formed upon or suitably attached to the bracket88. A locking screw 81 is provided for locking the bar or arm 82 inadjusted positions. If it is so desired, the bars 82 may have a key 88thereon, diametrically opposite the rack 83, which key, engaging in akeyway 89 in the barrel 8|, will cooperate with the rack 83 to preventrotation of the bar or arm 82 relative to the bracket 80.

If it is so desired, means may be provided forA facilitating themovement of the drills along the supporting arms or bars and in Figures15 and 16 of the drawings, a structure is shown which discloses suchmeans.

In this modification shown in Figures 15 and 16, the bracket or mounting25 has a pinion 98 rotatably carried thereby, which engages the teeth ofa rack 8| formed on the armor bar 92. Of course, this rack 8| may be thesame rack as the rack 83, shown in Figures 13 and 14, which cooperateswith a pinion 84 for moving the bar. The pinion 90 has a wrench head 93thereon by means of which the pinion may be rotated for moving the drill(not shown) carried by the bracket 25' along the bar 92.

When these rack and pinion structures, as shown in Figures 13 to 16inclusive are employed, the wrench heads 85 and 93 will be of the samesizes as the heads of the locking bolts 81, 28, etc., so that a singlewrench or crank handle may be used for all of the wrench heads and screwheads.

In Figures 17 to 19 inclusive, a modified form of the improved drillmounting or drilling rig is shown, and in Figure 17 various parts areshown in collapsed position with the drill mounting set for loweringinto a shaft Ior withdrawing it therefrom.

In this modified structure, the carrying body I8I is similar to thecarrying body and has a bail |82 connected thereto by means of which thedrill mounting may be raised from or lowered into a shaft.

The carrying body I8| has a column |81 depending axially therefrom whichis connected to the platform |03 by means of the sleeve |06. The column|01 has a plurality of drill or tool carrying units |08 carried therebywhich are similar or identical in construction to the drill or toolcarrying units 8. Each of the units |88 comprises a carrying arm |89which is swivelly connected by means of the ring |I to the column |01.Brackets 1| |8 are carried by the lower ends of the swinging arms |89and they are substantially identical with the brackets 8. Drill carryingbars |28 are slidably carried by the brackets IIB and are held in,adjusted positions in the same manner in which the bars 20 are held inad justed positions. Rock drills or other suitable tools as indicated at|24 are connected to or mounted upon the bars |20 so that they may beadjusted longitudinally along the bars |28 or pivotally thereto, beingconnected to the bars by means of brackets |25 which are identical inconstruction to the brackets 25.

The carrying body |0| has anchoring or steadying arms |33 pivotallyconnected thereto as shown at |35 and these arms are identical inconstruction with the arms 33 and are held in their collapsed or inwardmovement by means of the guiding arms |38 and the locking members |44.An air manifold |58 and a water manifold |54 are carried by the carryingbody IOI.

In all of the above respects the modified structure shown in Figure 17is identical with the structure shown in Figure 1, and the structureshown in Figure 1 is collapsed in exactly the same manner shown inFigure 17 for permitting its lowering into or withdrawal from a shaft.

However, the modified structure shown in Figure 17 differs from thestructure shown in Figure 1 in that the platform |03 has an annular well|88 formed therein and partitioning braces I6| are attached to thecarrying body |0I and form supporting braces against which drill steelsindicated at |82 may rest. The wells |60 are provided for receivingdrillsteels to be used in the drills |28 and the partitions |6| providedSeparate compartments for containing drill steels of different lengthsso as to keep the different length drill steels segregated, and alsothey may provide compartments for the -dulled drill steels.

As clearly shown in Figure 17 of the drawings, the platform |83surrounds the annular well |60, so that a man standing on the platformwill have ready access to any of the drill steels in any of thecompartments, and he can hand a drill of the desired length to the drilloperator and receive from the operator the dulled steel, therebyeliminating much time which would otherwise be required in the changingof the steels, and also eliminating the need of piling the steels on theworking surface or floor B of the shaft being sunk.

The platform |83 has a plurality of brackets |63 attached thereto towhich are pivotally connected narrow platforms |68. Suitable supportinghinging members |65 are provided for pivotally connecting the platforms|64 to the brackets |63. The hinging members |65 have extensions |66thereon which, when the platforms |64 are in extended position as shownin Figure 18, engage beneath the platform |03 and provide supports forthe narrow platforms or cat walks |58. The narrow platforms |64 may belowered into horizontal position so as to permit an operator to walk outalong them for adjusting the mine-feet |31 which are adjustably carriedby the anchoring or steadying arms |33. When the narrow platforms |68are not in use they are swung into substantially feed positions, asshown in Figure 17 and they may be hel-d therein by any suitable type oflocking means as indicated at |61.

Another slight difference is shown in Figure 17 from the structure shownin Figure 1 with respect to the mine-foot which is adjustably connectedto the end of the column |81. In Figure 17 the foot |38, which isadjustably connected by means of the feed screw |3| to the column |31,is shown resting upon a wooden block |68. This block |68 may be attachedto the foot or it may be independent thereof. The foot |36 is shownplaced in the sump C in the working floor B of the shaft, and byprovision of the feed screw |3| the drill mounting may have supportingcontact with the working surface B of the shaft and the drill carryingbars |20 be maintained at the proper elevation with respect to theworking surface. This is a distinct advantage owing to the fact that theworking surfaces B are usually very irregular.

From the foregoing description taken in connection with the accompanyingdrawings, it will be apparent that a drill mounting or drill rig hasbeen provided for sinking shafts by means of which the time and laborrequired for the sinking of a shaft will be very materially reduced andalso a drill mounting has been provided which may be easily and quicklylowered into a shaft or withdrawn therefrom, and in which the partswhich are extended while in operation, such as the arms 34 and the drillcarrying bars or arms 2U may be collapsed or moved inwardly to permitthe mounting to be freely and easily withdrawn from or lowered into ashaft.

It will be understood that the invention is not to be limite-d to thespecific construction or arrangement of parts shown but that they may bewidely modified within the invention defined by the claims.

What is claimed is:

l. In a drill mounting, a carrying body, a column carried by said body,a plurality of arms swingably carried by said column, drill supportingbars adjustably carried by said swingable arms, pneumatic tools,adjustable means connecting said tools to said bars for adjusting theposition of the tools relative to the bars, a plurality of anchoringarms pivotally carried by said body, and mine column feet adjustablyconnected to the ends of said anchoring arms.

2. In a drill mounting, a carrying body, a column carried by said body,a plurality of arms swingably carried by said column, drill supportingbars adjustably carried by said swingable arms, pneumatic tools,adjustable means connecting said tools to said bars for adjusting theposition of the tools relative to the bars, a plurality of anchoring amspivotally carried by said body, an air manifold carried by said carryingbody, a water manifold carried by said carrying body, individualconnections between said manifolds and said tools, mine columnv feetadjustably connected to the ends of said anchoring bars, and a minecolumn foot adjustably connected to the end of said columnremote fromsaid carrying body.

3. In a drilling rig, a carrying body, a column carried by and dependingfrom said carrying body, swinging arms carried by the column and mountedin superposed relation thereon, a plurality of brackets carried by saidswinging arms, and tool supporting bars adjustably carried by saidbrackets and extending radially of said column, and means for preventingrotation of said bars relative to said brackets, said bars slidablethrough said brackets to permit the bars to be moved into parallelcollapsed position, with their inner ends moved across the vertical axisof the drilling rig.

4. In a drilling rig, a carrying body, a column carried by and dependingfrom said carrying body, swinging arms carried by the column and mountedin superposed relation thereon, a plurality'of brackets carried by saidswinging arms, and tool supporting bars adjustably carried by saidbrackets and extending radially of said co1- umn, racks on said bars,and pinions carried by said brackets and engaging said racks for movingsaid bars longitudinally of the` brackets, said bars slidable throughsaid brackets to permit the bars to be moved into parallel collapsedposition,

with their inner ends moved across the vertical axis of the drillingrig.

5. In a drilling rig, a carrying body, a column carried by and dependingfrom said carrying body, swinging arms carried by and extending radiallyof the column and mounted in superposed relation thereon, a plurality ofbrackets carried by said swinging arms, and tool supportlng barsadjustably carried by said brackets and extending radially of saidcolumn, drill carrying brackets mounted on said bars and constructed andarranged to permit longitudinal and pivotal movement of the drillsrelative tothe bars, racks on said bars, and pinions carried by saidtool carrying brackets for engagement with said racks to move the toolcarrying brackets along the bars, said bars slidable through saidbrackets to permit the bars to be moved into parallel collapsed positionwith their inner ends moved across the vertical axis of the drillingrig.

6. In a drilling rig, a carrying body, a bail thereon, drill carryingmeans adjustably supported from said carrying body, anchoring armspivotally connected to said carrying body and extending radiallytherefrom, means carried by the carrying body for guiding and limitingpivotal movement of said anchoring arms, locking means for holding saidanchoring arms in folded positions, and mine column feet adjustablyconnected to the ends of said pivoted bars.

7. In a drilling rig, a carrying body, anchoring arms pivotallyconnected to said carrying body, means carried by the carrying body forguiding and limiting pivotal movement of said anchoring arms, swingingarms carried by said carrying body, drill-supporting bars slidablycarried by the ends of said swinging arms and having their inner endsoutwardly of the axis of the carrying body when they drilling rig is indrilling position, said drill-carrying arms adapted to be moved withtheir inner ends across the vertical axis of the carrying body when thedrilling rig is in collapsed position.

8. In a drilling rig, a carrying body including a horizontal platform, amanifold supporting structure rising above said platform, anchoring armspivotally carried by said manifold supporting structure, a columncarried by and depending axially from said platform, and a plurality ofrock drill supporting bars swingably and slidably carried by saidcolumn.

9. In a drilling rig, a` carrying body including a horizontal platform,a manifold supporting structure rising above said platform, anchoringarms pivotally carried by said manifold supporting structure, a columncarried by and depending axially from said platform, and a plurality ofrock drill supporting bars swingably and slidably carried by saidcolumn, means for guiding and limiting the pivotal movement of saidanchoring arms, and locking means for holding the anchoring arms infolded positions.

10. In a drilling rig, a carrying body, adjustable means for anchoringsaid carrying body in a shaft, a column depending from said carryingbody, a plurality of swinging arms mounted on said column forindependent swinging movement about the column, said swinging arms alsomounted for independent vertical adjustment on said column, spacingcollars for holding said swinging arms in vertically adjusted positions,and drill-carrying bars adjustably carried by said swinging arms.

11. In a drilling rig, a carrying body, adjustable means for anchoringsaid carrying body in a shaft, a column depending from said carryingbody, a plurality of swinging arms mounted on said column forindependent swinging movement about the column, said swinging arms alsomounted for independent vertical adjustment on said column, spacingcollars for holding said swinging arms in vertically adjusted positions,drill-carrying bars slidably and rotatably carried by the ends of saidswinging arms and having their inner ends outwardly of the axis of thecolumn when the drilling rig is in drilling position, said bars movableto position their' inner ends across the vertical axis of the column tocollapse the drilling rig for insertion into or removal from a shaft. Y

12. In a drill mounting, a carrying body, a raising and loweringconnection on said body, attaching arms adjustably carried by said body,rock drill supporting bars adjustably carried by said attaching arms, aplurality of rock drills, adjustable means connecting said rock drillsto said supporting bars for adjustment along the suppo-rting bars andpivotal movement relative thereto, anchoring arms pivotally carried bysaid carrying body, means for locking said anchoring arms in adjustedpositions, and foot pieces adjustably carried at the ends of saidanchoring arms.

13. In a drilling rig, a carrying body, adjustable means for anchoringsaid carrying body in a shaft, a plurality of swinging arms carried bysaid carrying body for independent swinging movement, said swinging armsalso mounted for independent vertical adjustment relative to saidcarrying body, spacing collars for holding said swinging arms invertically adjusted positions, drill carrying bars slidably androtatably carried by the ends of said swinging arms and having theirinner ends outwardly of the axis of the carrying body when the drillingrig is in drilling position, said bars movable to position their innerends across the vertical axis of the carrying body to collapse thedrilling rig for insertion into or removal from a shaft.

14. In a drilling rig, acarrying body, a manifold support structure,anchoring arms pivotally carried by said manifold supporting structure,a column carried by and depending axially from said carrying body, aplurality of rock drill supporting bars swingably and slidably carriedby said column, and locking means carried by said supporting structurefor locking said anchoring arms in adjusted positions.

15. In a drilling rig for sinking shafts, a carryingv body, a pluralityof swinging arms carried by said body for swinging about the verticalaxis of the carrying body, pneumatic-tool carrying bars adjustablycarried by said swinging arms for adjustment transversally of the axisof the carrying body, an air manifold carried by said carrying bodyandconcentric of its vertical axis, and a water manifold extendinglongitudinally through said air manifold to cool the air therein.

16. In a drilling rig for sinking shafts, a. carrying body including ahorizontal platform, a plurality of swinging arms carried by said bodyfor swinging about the vertical axis of the carrying body,pneumatic-tool carrying bars adjustably carried by said swinging armsfor adjustment transversally of the axis of the carrying body, amanifold supporting structure carried by said platform, an air manifoldcarried by said supporting structure and concentric of the vertical axisof the carrying body, and a water manifold extending longitudinallythrough said air manifold to cool the air therein.

17. In a drilling rig for sinking shafts, a carrying body including ahorizontal platform, a plurality of swinging arms carried by said bodyfor swinging about the vertical axis of the carrying body,pneumatic-tool carrying bars adjustably carried by said swinging armsfor adjustment transversally of the axis of the carrying body, amanifold supporting structure carried by said platform, an air manifoldcarried by said i supporting structure and concentric of the verticalaxis of the carrying body, and a water manifold extending longitudinallythrough said air manifold to cool the air therein, anchoring armspivotally carried by said manifold supporting structure, and lockingmeans carried by said supporting structure for locking said anchoringarms in adjusted positions.

18. In a drilling rig, a column, a plurality of swinging arms mounted onsaid column for independent swinging movement about the column, bracketscarried by said arms for swinging movement relative to the arms, andpneumatic tool supporting arms slidably carried by said brackets foradjustment transversally of the swinging axis of said arms, pivotallymounted anchoring arms for anchoring said column in position in a shaft,and locking means for locking said anchoring arms in adjusted positions.

19. In a drilling rig, a carrying body, adjustable means for anchoringsaid carrying body in a shaft, a plurality of swinging arms carried bysaid carrying body for independent swinging movement, said swinging armsalso mounted for independent vertical adjustment relative to saidcarrying body, drill carrying bars slidably and rotatably carried by theends of said swinging arms and having their inner ends outwardly of theaxis of the carrying body when the drilling rig is in drilling position,said bars movable to position their inner ends across the vertical axisof the carrying body to collapse the drilling rig for insertion into orremoval from a shaft.

GEORGE H. GILMAN.

